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Big Ideas:
Vertical angles are opposite angles that share the same vertex and measurement.
Adjacent angles share the same side and vertex.
Vertical and adjacent angles can be used to find the measures of unknown angles.
This lesson builds on students’ previous work with decomposing angles and recognizing that angles measurements are additive. The task requires students to use identify vertical and adjacent angles in a diagram by choosing the smallest or largest slices of pizza. The mathematical concepts in the lesson build toward student understanding of rotations, reflections, and translations.
Vocabulary: vertical angles, adjacent angles, supplementary angles, complementary angles, vertex
Special Materials:
pencil